The Thirty-ninth was based on Freedom, along with several other AFFS and LCAF units, as part of a group that would strike in planned later waves of the invasion. Those plans were aborted however, and the 39th would see no action in the War of 3039.[4]

The 39th completed several combat resupply missions to resistance forces on Bone-Norman, Somerset, and Black Earth. These efforts, though successful, cost the 39th about a third of its DropShips.[5] They sortied from their homeworld of Newtown Square to make these supply runs.[6]

The 39th allied with Victor Steiner-Davion, but didn't relocate to the Federated Suns. On Newtown Square, they split into several smaller hunter teams. When the 14th Donegal Guards arrived, the 39th led them on a chase across the world. The 39th regrouped and fought the 14th, facing destruction at the Lyran unit's guns, but the timely arrival of the 244th Division allowed Victor Steiner-Davion and the 39th to take the 14th Donegal prisoner. Victor stripped the 14th of their transport assets and gave them to the 39th, leaving the 14th in place on Newtown Square to defend against the Clans.[7] The 39th used their new JumpShips to land on Coventry, where they destroyed the 1st Coventry Jaegers[8] Shortly thereafter they linked up with the 6th Crucis Lancers and took control of Alarion.[9] Once relieved by the 7th Crucis Lancers they went to Tharkad to support Peter Steiner-Davion in the Lyran Alliance.[10] Though they didn't take part in the final battle of Tharkad, they did remain in orbit as reserve troops.[11][12] They later returned to the Federated Suns and were stationed on Wernke.[13]

During the Star League era all of the Avalon Hussars were required to focus on being both flexible and mobile, with every regiment required to be capable of deploying within eight hours, although many of the Hussars struggled to actually achieve this.[16]

After the Clan Invasion a common Thirty-ninth tactic was for the fast scout units go out and search for the enemy formation. When detected a series of raids begin to seed chaos and give the main force enough time to gather for the final assault.[5]

- At this point in time the Thirty-ninth was stationed on Kentwood. In common with the other regiments of the Avalon Hussars the Thirty-ninth had an attached aerospace wing, although these forces were primarily tasked to provide ground support rather than escort duties.[16]